Ventilator-damper.



f 3173mm. by

A. WUEST.

VENTILATOR DAMPER. APPLICATION FILED MAR. 1. I916.

1,21 9,615. Patented Mar. 20, 1917.

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Witnesses Atto rn eys A. WUEST. VENTILATOR DAMPER. v 'APFUCATION FILED MAR-1,1916 1,21 9,61 5. Patented Mar. 20, 1917.

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minno wAsNlNnmM o c ANDREW WUEST, 0F GLEAN, NEW YORK.

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Specification of Letters Patent.

Patented Mar. 2Q, 1917.

Application filed March 1, 1916. Serial No. 81,456.

To all whom it may concern:

Be it known that I, ANDREW Winter, a citizen of the United States, residing at Olean, in the county of Cattaraugus and State of New York, have invented a new and useful Ventilator-Damper, of which the following is a specification.

This invention relates to dampers particularly designed for use in connection with ventilators.

One of the objects of the invention is to provide a damper designed to fit properly within the ventilator below the cap and move upwardly to close the annular opening between the cap and the ventilator body thereunder.

A further object is to provide novel means whereby the damper will be caused to move upwardly when revolved in one direction and, when released, will gravitate back to its normal position.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and inthe details of construction hereinafter de-' scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure 1 is a central vertical section through the ventilator and showing the damper in its normal or lowermost position.

Fig. 2 is a similar view showing the damper raised to close the ventilator.

Fig. 3 is a bottom plan view of the ventilator and damper.

Fig. dis a perspective view of the damper.

Referring to the.figures by characters of reference 1 designates the cylindrical body of the ventilator provided at its upper end with an annular flange 2 and with upwardly extending angular brackets 3 supporting a conical cap 4. This cap extends entirely over the upper end of the ventilator and is preferably of approximately the same diameter as the flange 2. Brackets 3 project radially beyond the cap and serve to connect a guard ring 5 to the ventilator, this ring being concentric with but spaced from the cap and flange.

The parts heretofore described are of an ordlnary type of ventilator and, in themselves, constitute no part of the present invention.

Secured within the body 1 are substantially U-shaped guide brackets 6 each of which has a grooved anti-friction roller 7 journaled therein. 1 he upper ends of each bracket are inturned to form retaining lips as shown at 8.

Mounted for rotation within the body 1 is a cylindrical damper 9. This damper has its lower end portion provided with angular rewhich, when rotated 1n one d1rect1on Wlll cesses whereby substantially triangular wings 10 are formed. Each of these wings has a bead 11 along one of its edges and these beads are adapted to work within the respective brackets 6 so as to ride upon the anti-friction rollers 7 and be held thereto by the inturned lips 8. Thus it will be seen that when the damper is rotated in one direction, the beads will travel along the rollers and cause the damper to move upwardly to position its upper edge against the cap 4. and thus completely close the ventilator. This position of the damper has been illustrated in Fig. 2.

In order to reduce lateral sway of the damper within the ventilator casing to the minimum, a rib 12 is pressed outwardly from said damper and is adapted to work close to and if necessary engage the inner surface of the ventilator. This spacing rib is preferably extended approximately paral lel with the edges of the wings.

The damper is braced transversely by a plurality of crossed radial brace rods 13 connected at their centers as shown at l l or can be braced in any other manner desired.

Attached to the ventilator casing at a suitable point therein is a bracket 15 to which is connected a swinging arm 1 1 carrying a pulley 17 Mounted on this pulley is a flexible actuating element preferably in the form of a chain 18 although it is to be understood that a knotted cord or any other suitable device may be used. This flexible element is attached at one end to the lower end portion of one of the wings 10 and its other end may hang freely within convenient grasp of the operator. The depending portion of the flexible actuating element 18 is preferably extended through a holding bracket 19 having a keyhole slot 2-0.

One of the wings 10 can be cut away to form an angular recess 21 as shown in Figs.

1 and 2, one wall of this angular recess being designed to come against one side of the bracket when the damper is in lowered position thus to limit the downward movement of the damper. This will be obvious by referring to Fig. 1.

Assuming that the damper is in the lowered or open position of Fig. 1, the same can be raised to closed position simply by pulling downwardly on the flexible actuating element 18. This element will pull inwardly on the wing 10 to which it is attached and will cause the damper 9 to 1'0- tate. As the beaded edges 11 of the wings 10 are guided within the bracket 6 it will be obvious that such rotation of the damper will result in its upward movement until the upper end thereof comes against cap 4. The damper can be held in this raised position by shifting the connection 18 into the narrow portion of the slot 20 whereupon it will be engaged and held. By removing the connection 18 from the narrow portion of the slot and releasing said connection the damper will be free to turn downwardly to its initial position.

What is claimed is 1. The combination with a cylindrical ventilator and a cap extending thereover and spaced therefrom, a cylindrical damper fitted within the ventilator, said damper having depending wings with inclined edges, means mounted within the ventilator for engaging and guiding said edges, and means Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Washington, D. 0."

for rotating the damper, said guiding means cooperating with the edges of the wings to shift the damper longitudinally during such rotation.

2. The combination with a cylindrical ventilator body and a cap extending thereover and spaced therefrom, of a cylindrical damper mounted to rotate and to shift longitudinally within the body, said damper having depending wings provided with inclined lower edges, damper supports movably engaged by said edges, and means located within the damper for rotating said damper to shift it longitudinally toward the cap.

The combination with a cylindrical ventilator body and a cap extending thereover and spaced therefrom, of a cylindrical damper mounted to slide and rotate within the body and having depending wings provided with inclined lower edges, damper supports secured within the body and engaging said edges, and means secured to and surrounded by the damper for rotating said damper relative to its supports thereby to shift the damper longitudinally within the body and toward the cap.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

ANDREW WUEST.

Witnesses:

M. J. Human, C. S. SMITH.

Patents, 

